ACUTE AND CHRONIC TOXICITY OF NONYPHENOL TO TEN SPECIES OF AQUATIC ORGANISMS
Brooke, Larry T.
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The Environmental Health Laboratory at the University of Wisconsin-Superior (UW-S)conducted tests to complete the data set necessary to derive national water quality criteria for nonylphenol. The tests were the eight acute tests specified in the "Guidelines for deriving numerical national water quality criteria for the protection of aquatic organisms and their uses" (Stephan et al. 1985). Two acute tests with plants were also conducted. The Guidelines require three chronic tests to derive a chronic criterion. Two chronic tests were conducted with freshwater species sensitive to nonylphenol. The third chronic must be for a saltwater species if both fresh and saltwater criteria are to be developed.
This document was amended on 18 October 2005 to correct mistakes in this report that were not consistent with the data reported in the original laboratory records. The mistakes were due to transcription entries in the final report and not noticed until this date. The most important errors were associated with the Daphnia magna acute test causing the computation of an incorrect LC50 value.